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90 lines
1.8 KiB
TypeScript
90 lines
1.8 KiB
TypeScript
declare namespace QuickLRU {
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interface Options {
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/**
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The maximum number of items before evicting the least recently used items.
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*/
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readonly maxSize: number;
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}
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}
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declare class QuickLRU<KeyType extends unknown, ValueType extends unknown>
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implements Iterable<[KeyType, ValueType]> {
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/**
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The stored item count.
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*/
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readonly size: number;
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/**
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Simple ["Least Recently Used" (LRU) cache](https://en.m.wikipedia.org/wiki/Cache_replacement_policies#Least_Recently_Used_.28LRU.29).
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The instance is [`iterable`](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Iteration_protocols) so you can use it directly in a [`for…of`](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Statements/for...of) loop.
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@example
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```
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import QuickLRU = require('quick-lru');
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const lru = new QuickLRU({maxSize: 1000});
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lru.set('🦄', '🌈');
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lru.has('🦄');
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//=> true
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lru.get('🦄');
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//=> '🌈'
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```
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*/
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constructor(options: QuickLRU.Options);
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[Symbol.iterator](): IterableIterator<[KeyType, ValueType]>;
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/**
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Set an item.
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@returns The list instance.
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*/
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set(key: KeyType, value: ValueType): this;
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/**
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Get an item.
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@returns The stored item or `undefined`.
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*/
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get(key: KeyType): ValueType | undefined;
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/**
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Check if an item exists.
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*/
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has(key: KeyType): boolean;
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/**
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Get an item without marking it as recently used.
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@returns The stored item or `undefined`.
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*/
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peek(key: KeyType): ValueType | undefined;
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/**
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Delete an item.
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@returns `true` if the item is removed or `false` if the item doesn't exist.
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*/
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delete(key: KeyType): boolean;
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/**
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Delete all items.
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*/
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clear(): void;
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/**
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Iterable for all the keys.
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*/
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keys(): IterableIterator<KeyType>;
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/**
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Iterable for all the values.
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*/
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values(): IterableIterator<ValueType>;
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}
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export = QuickLRU;
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